ok. i just installed a jdm dc header 2.5". on my 98 gsr. and didnt want to keep my stock exhaust. at this time im running straight pipe to a apexi muffler. car runs great. i connected the primary o2 censor that goes into the header. my friend let me borrow his 95 gsr ecu and jumper harness.. when i start my car i have to give it gas, if not it would die out. seems the car runs ok when the car is warm. few days ago i was pulling into my driveway @ about 10-15mph. and the car just stalled. just wondering why it does that. thanks

 

faulty ecu or wrong harness? there's a obd2a and obd2b harness. did u try resetting the ecu?

 

i didnt know ther were differnent harnesses. i did reset the ecu. im gona look into the harness i guess.